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@fcwu /hello.py
Created Jun 17, 2013

What would you like to do?
python, gtk 3 and CSS
#!/usr/bin/python3
from gi.repository import Gtk, Gdk
import sys
class MyWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Hello World")
self.set_name('MyWindow')
self.set_default_size(600, 300)
self.box = Gtk.HBox()
self.box.set_halign(Gtk.Align.CENTER)
self.box.set_valign(Gtk.Align.CENTER)
self.add(self.box)
self.button1 = Gtk.Button(label="Hello")
self.button1.connect("clicked", self.on_button1_clicked)
self.box.pack_start(self.button1, True, True, 0)
self.button2 = Gtk.Button(label="Goodbye")
self.button2.connect("clicked", self.on_button2_clicked)
self.box.pack_start(self.button2, True, True, 0)
def on_button1_clicked(self, widget):
print("Hello")
def on_button2_clicked(self, widget):
print("Goodbye")
def main(argv):
def gtk_style():
css = b"""
* {
transition-property: color, background-color, border-color, background-image, padding, border-width;
transition-duration: 1s;
font: Cantarell 20px;
}
GtkWindow {
background: linear-gradient(153deg, #151515, #151515 5px, transparent 5px) 0 0,
linear-gradient(333deg, #151515, #151515 5px, transparent 5px) 10px 5px,
linear-gradient(153deg, #222, #222 5px, transparent 5px) 0 5px,
linear-gradient(333deg, #222, #222 5px, transparent 5px) 10px 10px,
linear-gradient(90deg, #1b1b1b, #1b1b1b 10px, transparent 10px),
linear-gradient(#1d1d1d, #1d1d1d 25%, #1a1a1a 25%, #1a1a1a 50%, transparent 50%, transparent 75%, #242424 75%, #242424);
background-color: #131313;
background-size: 20px 20px;
}
.button {
color: black;
background-color: #bbb;
border-style: solid;
border-width: 2px 0 2px 2px;
border-color: #333;
padding: 12px 4px;
}
.button:first-child {
border-radius: 5px 0 0 5px;
}
.button:last-child {
border-radius: 0 5px 5px 0;
border-width: 2px;
}
.button:hover {
padding: 12px 48px;
background-color: #4870bc;
}
.button *:hover {
color: white;
}
.button:hover:active,
.button:active {
background-color: #993401;
}
"""
style_provider = Gtk.CssProvider()
style_provider.load_from_data(css)
Gtk.StyleContext.add_provider_for_screen(
Gdk.Screen.get_default(),
style_provider,
Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION
)
gtk_style()
win = MyWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()
if __name__ == "__main__":
main(sys.argv)

Nice! Any possibilities to change cursor property via css?

That's great! Thank you so much!

medeotl commented Mar 21, 2017 edited

too bad, I get this error:

Traceback (most recent call last):
File "css.py", line 104, in
main(sys.argv)
File "css.py", line 97, in main
gtk_style()
File "css.py", line 89, in gtk_style
style_provider.load_from_data(css)
GLib.Error: gtk-css-provider-error-quark: :6:10not a number (1)

split line 5 in:

font-family: Cantarell;
font-size: 20px;

seem to fix the issue. Not sure css is correctly applyied tough...

EDIT: also using .text-button instead of .button, and everything will work flawlessly

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